Improvement in curbing for excavations



PATENTED JAN. 10, 1871.

lie-110,882.

H. WHI'JQESTONE. GURBING FOR EXOAVATIONS.

FIG4

.may or may not have dowels in tthe ends. l

tau t e HENRY WHITESTONE, or

LOUISVILLE, Kurrruour.

V Letters Patent Nd. momma January '10, 1871.

I lMPROVEMENT m euuemc FoR IEX'CAVATIQNS.

- The Schedule referred to in Letters Patent and making p'att or the same.-

I, HENRY Wmcrnsronn, of the city of Louisville,

county of J efl'erson and State of Kentucky, have inrented a new and useful Method of Ourbing'for Maintaining the Banks of Excavations in Sandy and Loose Soils, capable of being applied and removed without injurious disturbance of the banks, of which the following isa'specification. l g

The nature of this invention consists in the use of acurb of wood, or any.suitable material, made of spiral sections of an annulus, with radiated end-joints, the sections to be of 'the thickness necessary to form arch-joints sutiicieut to resist the pressure .of the banks, and the depth and length ofi'jeaoh section to be proportioned to the'.nature of the soil andthe" ability of handling the same, the sections to be made small in very loosesand and larger in stifler soils, the-- sections to be made so as .t'o,break joints'a't ends, and

These sections are inserted one ata time, hing at the top,'a's the excavation progresses, and, when the required depth is obtained they are re moved one by one, commencing at the bot-tom, the space being filled .in with masonry as each section is taken out, as will be hereinaftenfully described.

Having thus fully described the nature of my in rontion, a more complete:understanding 'ot which may be had by reference to lthedrawing, in which- Figurel is a'plun of the curbing with the guide drum omitted.

\ Figure? is aside eleratiou of the same.

Figure 3 is a plan, showing the curbing inclosed in the guide-drum A. i g

' Figure 4: is a" vertical section through curbing, showing guide-drum A and guide-strip B.

Figure 5 is a perspective view of one of the sections of curb c. 4

To enable others skilled in the art to make andiise my invention, I will proceed" to describe its operation, which. is as follows:

The guide-drum A, which is ahollow cylinder sufficiently long to contain at least one full course of the spiral sections 0, and provided with theguide-strip B, is first taken and set with its axis truly vertical, and sunk in the sand or soil .at the point where the excavation is to be made untilits upper edge is on a the outer surface of the drum.

' Tliewvorkman next proceeds by excavating under the drum, making only room enough to receive a single'section, (which may be that marked lin the drawing,) and places said section" under and close up to I the bottom of the guide-strip B, on the inside of the dru'm, and packsa'nd rains the soil under itto main- I tain it in position. 1

- He next excaratcs a place for another section, (N o. 2,) and sets it-in the same manner, with-its end in close contact with that of thefirst section; and each succeeding piece is inserted in the same manner un-.

' til'the-desirecl depth is attained, the sand or soil bc-.

ing-excavated down to the bottom line of the curbing and removed from the well.

Each successive excavation is only of such -capac ity as toreceive a single block, and .the latter is inserted'as soo'n' 'as a place has beer: prepared for it.

Wlieii--tlre}dcsired depth is reached, the lasts'ectiou put .in is removed and 'iuasonryis substituted, filling ."the placefornierly occupied by the section. This-is continued to the top,'-in spimlcourses, the process being the reverse ofi-putting in the curbing.

g In case of building .piers or in underpinning walls,

hfhere the restoration of theground, except in places occupied by masonry, is important, the curbing is put in as above described; and as masonry is carried up the'sections are removed from the bottom upward, as

before explained, and sand or soil is filled in the vacant places and well rammed, leaving the ground around the masonry as solid as it was before the commencement of the excayation'; +The, curbing, when be laid touching the banks, which gives the support requ'iredto resist the pressure of the water and pre-- vent displacement of the brick.

What I'claim as new, and desire to secure by Letters Patent, is l Spiral curbing, composed of sections 0, the guide drum A, and guide-stripB, made and employed sub stant-ially in the manner and for the purposes described.

HENRY WHITESTONE}.

Witnesses: I Joan Gnovn, V

CLINTON MCCLARTY; 

